Al-Si/Al2O3 in situ composite prepared by displacement reaction of CuO/Al system

作者: Min , Hongmei , Chen , Guanghui , Yu

DOI:

关键词: Single displacement reactionMetallurgyIn situMaterials scienceComposite numberChemical engineering

摘要: Al2O3 增强粒子的 ZL109 合成被准备由在在 CuO 和艾尔之间的 situ 反应。微观结构借助于 OM, SEM 和 TEM 被观察。在尺寸在矩阵一致地散布的亚微米的 粒子,和 Cu 代替了从在里面 反应与另外的合金元素形成网状的合金阶段。坚硬和在房间温度的 composites 的张力的力量作为与矩阵的相比有细微增加。然而,在 350 点的张力的力量比矩阵的高到达了 90.23 MPa,或 16.92 MPa。在 CuO/Al 系统的反应的机制被微分扫描使用热量测定(DSC ) 和热力学的计算学习。在 和艾尔之间的反应包含二步。首先, 与艾尔一起反应在矩阵合金的融化的温度形成 Cu2O Al2O3,并且第二, 与艾尔一起反应在更高的温度形成 Al2O3。在扔 750-780 的温度的 ZL109,因为第一个步骤的发热的反应的效果,第二个步骤能也发生。

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